One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,3)(4,7,11,9)(5,10,13,8)(12,15,16,14)(17,18,23,25)(19,22,20,24)(21,26,30,32)(27,29,28,31)(33,34,40,44)(35,38,41,36)(37,47,46,42)(39,48,45,43)(4,11)(7,9)(12,16)(14,15)(17,19,23,20)(18,24,25,22)(21,28,30,27)(26,29,32,31)(33,35)(34,36)(37,45)(38,44)(39,46)(40,41)(42,43)(47,48)(2,3)(7,9)(8,10)(14,15)(18,25)(19,20)(26,32)(27,28)(33,36,40,38)(34,41,44,35)(37,48,46,43)(39,42,45,47)(1,3,6,2)(4,9,11,7)(5,10,13,8)(12,15,16,14)(17,20,23,19)(18,22,25,24)(21,28,30,27)(26,29,32,31)(33,37,40,46)(34,42,44,47)(35,45,41,39)(36,43,38,48)(1,4)(2,7)(3,9)(5,12)(6,11)(8,14)(10,15)(13,16)(17,21,23,30)(18,26,25,32)(19,27,20,28)(22,29,24,31)(33,38,40,36)(34,41,44,35)(37,43,46,48)(39,42,45,47)(1,5)(2,8)(3,10)(4,12)(6,13)(7,14)(9,15)(11,16)(17,22)(18,19)(20,25)(21,29)(23,24)(26,27)(28,32)(30,31)(33,39,40,45)(34,43,44,48)(35,46,41,37)(36,42,38,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.